Drain plug



Jan. l0, 11939. E. SIEGMAN 2,143,499

DRAIN PLUG' I Filed Dec. 3, 1957 Inventor Patented Jan. 10, 1939 UNITED STATES PATENT CFFICE 2 Claims.

This invention relates to drain plugs and an object of the invention is to provide an adjustable drain plug particularly designed for use in connection with shower baths of the type having 6 tiled floors.

In accordance with the present invention I provide a drain plug that is particularly designed for use in conjunction with a lead trap for a shower drain floor and my plug can be adjusted'as found desirable and be so associated with the trap as to permit water seeping through the floor tiling to drain into the trap.

The invention together with its objects and advantages will be best understood from a study oi l5 the following description taken in connection with the accompanying drawing wherein Figure 1 is a sectional view taken through a shower floor structure and drain pipe and illustrating the application of my improved plug.

Figure 2 is a top plan View of the plug, and

Figure 3 is a Vertical sectional view through the plug.

Referring to the drawing by reference numerals it will be seen that 5 indicates generally a oor structure of the type employed with shower baths,

and in the present instance the door 5 is shown as consisting of a pan 6 of sheet lead and confined within the pan 6 is a bottom layer of cinders 'l and a top layer of cement 8. Over the cement layer 8 is laid the tile flooring 9.

The drain trap is indicated by the reference numeral Ill and in the present instance the inlet end of the drain trap extends through an opening I I provided therefor in the bottom of the lead pan 6 and is flanged as at I2 to overlie the inner surface of the floor of the pan. The ange I2 is soldered to the flooring of the pan 6.

The improved drain plug is indicated by the reference numeral I3 and in the present instance is shown as being of two diameters having a relatively large upper diameter I4 and a smaller lower diameter I5. Thus between the diameters lli and I5 is provided a shoulder I6 which rests on the layer of cinders l. At the upper end of the'large diameter I4 the plug is provided with an outstanding flange I'I that rests on the upper layer 8 of cement and is laid flush with the ilooring 9i. It will be noted that the diameter I5 of the plug is slightly less than the diameter of the trap lll so as to provide a space therebetween which will permit water that may seep through the tiling 9 and the layers 'l and 8, to drain into the trap lll.

Further in accordance with the present invention the diameter I5 of the plug is provided with spiral threads i8 that bite into the soft material of the trap IEI forming their own complemental threads to the end that the plug I3 may be positioned at the desired position of adjustment and as may be required dependent upon the thickness 5 of the layers 'I and 8. Further this threaded engagement effected between the plug I3 and the trap t0 will insure the secure retention of the plug in position.

Also for the plug a suitable guard screen or 10 strainer I9 is provided and this latter rests on an internal seat 20 provided therefor in the large diameter I4 of the plug so that the guard or strainer I 9 is flush with flange II.

For securing the strainer or guard I9 in posi- 15 tion the large diameter I4 of the plug is provided with apertured, threaded lugs 2l through the medium of which and screws 22 the guard or strainer I9 is secured held in position at the inlet end of the plug. 2

It is thought that a clear understanding of the construction, utility and advantages of a drain plug of this character will be had without a more detailed description.

Having thus described the invention what is 25 claimed as new ist- 1. In a drain plug, and in combination with a trap for said drain, a two-diameter plug adapted to t within the drain and having its smaller diameter extending into the trap, the smaller di- 30 ameter of the plug being materially less than the diameter of the trap whereby to provide a spacing between the smaller diameter of the plug and the trap to permit seeping water to nd its way into the trap, said trap being in the form of a lead pipe, and said plug on the smaller diameter thereof being provided with spiral threads to bite into the material of the trap in a manner to secure the plug at the desired position of adjust-l ment relative to the trap. 4o

2. In a drain, the combination of a drain trap in the form of a lead pipe, and a drain plug having a cylindrical portion of materially less diameter than the diameter of the trap-pipe and provided with threads for biting engagement 5 with the material of the trap-pipe in a manner to secure the plug at the desired position for adjustment relative to the trap and with the threaded portion of the plug spaced from the wall of the trap-pipe to permit seeping water to pass downwardly into the trap between the threaded portion of the plug and the wall of the trap-pipe.

EDWARD L. SIEGMANN. 

